Adding a link to a button

Hi Noda,
Can you help me with this? I attached a screenshot of the trouble I am having. As you can see, I have a button titled “I’m in. Send me more information now!” I am having problems inputting a URL to that button. As you can see when I try to do it, it pops up in the left corner of the box. I want the URL in the center where it is boxed, can you help?

Ravleen